Australian Sports Anti-Doping Agency testers swooped on Fittler's house in Sydney on Thursday night, just a day after the NRL announced Fittler had been given the green light to play for the Sydney Roosters at the Auckland Nines.

NRL head of football Todd Greenberg announced at a promotion for the Nines on Wednesday that Fittler's return to rugby league after 10 years had been okayed after the former Kangaroos skipper had passed a series of physical tests.

A night later Fittler revealed he had been paid a visit by ASADA testers.

"1st drug test in 10 years. In the convenience of my home #goodtobeback," Fittler wrote on his Twitter account with a link to his Instagram account where he posted a picture of his urine in a plastic container.

At the Nines promotion Fittler spoke of his determination to prove wrong critics of his comeback at the Eden Park event.

"The good thing at 42 is you don't really care what people think anymore so that's one of the handy things about being criticised now," Fittler said.

"They (critics) haven't seen me play now and hopefully they will make a comment after and they might be able to reassess what they were thinking." Fittler is set to line up alongside premiership winning halfback Mitchell Pearce at the short-format tournament on February 15 and 16.

Brad Fittler on the charge back in his playing days.Source:News Limited

Grand final hero Shaun Kenny-Dowall is also likely to be part of the Roosters side as he makes his return from a broken jaw suffered in last year's decider at the Nines.

Jackson Hastings, son of Roosters great Kevin, is likely to make his debut for the tricolours in Auckland. AAP jms/gjw